Screen for cotton cleaners



Nov. 21, 1933. A. s. MACKENZIE SCREEN FOR COTTON CLEANERS Filed Aug. 6,1931 gwuentoc AkxamerJA/aafezzzzb Patented Nov. 21, 1933 I SCREEN FORCOTTON CLEANERS Alexander S. Mackenzie, Houston, Tex., assignor to ElkManufacturing Company, Elk City, Okla., a corporation of OklahomaApplication August 6, 1931. Serial No. 555,601

4 Claims. (CI. 19-95) The present invention relates to improvements inscreens particularly designed for separating dust, dirt, motes and otherextraneous matter from cotton lint and consists in the particularconstruction of screen that will be hereinafter more particularlydescribed in connection with the accompanying drawing, in which:

Figure 1 is a plan of a section of a screen embodying the invention.

Figure 2 is a section substantially on the line.

22 of Figure 1.

Figure 3 is a section on the line 3-3 of Figure 1, illustrating more orless diagrammatically the action of the screen when in use.

Referring to the drawing, in the several figures of which like parts aredesignated by the same reference character, the screen comprises a bodysheet or plate preferably made of metal and which may be of any suitabledimensions, being surrounded by a frame not shown.

Preferably the body sheet or plate will be of metal and as shown istransversely corrugated, each of the corrugations providing a supportingsurface 1, which is inclined upwardly in the direction of movement ofmaterial to be treatedthereover, such corrugations extendingtransversely of the direction of movement of the material to be treated.

In each of the inclined surfaces 1 is formed a plurality of perforations2, preferably made in the form of slots elongated in the direction ofthe length ofithe corrugations and located at the upper edge of eachinclined section 1. As shown, particularly in Figure 1, the apertures orperforations 2 are relatively long and those in each corrugation arearranged out of alignment with those in the adjacent corrugation, theseveral perforations being spaced or separated by relatively narrowweblike portions 4 of the screen plate.

As shown, particularly in Figure 3, the corrugations are so formed thatsubstantially vertically extending sections 5, 6 are provided at theedges of each inclined portion 1 and from said figure,

it will be seen that as the cotton fiber and other 7 material is movedover the plate, the sections 5 at the upper ends of the perforations orslots 2 will constitute abutments against which the material will bearand by which undesirable foreign material will be detached from the bodyof fiber and permitted to fall through the perforations as representedin Figure 3.

The material to be treated is moved over the upper surface of thescreen, by suitable means, such for example as a drum or cylinder havingperipheral projections and bythe particular arrangement shown anddescribed undesirable foreign material such as particles of dust, dirt,motes, etc., will be effectively separated from the fiber.

It will be seen that the construction is a very simple and inexpensiveone and by the particular arrangement of the apertures 2 and theirrelation to the inclined supporting surfaces 1, the screen is providedwith a relatively large number of sub-stantially vertical surfaces orabutments against which the cotton will be caused to rub in passing overthe screen, thus effectively loosen ing and shaking out theparticles offoreign matter.

1 Having thus described the invention, what is claimed is:

1. A screen for cotton cleaners comprising a metal sheet which isprovided with corrugations, the length of each of which is transverse tothe direction of movement over the screen of cotton to-be cleaned andeach corrugation providing a supporting surface that is inclined upwardin the direction of movement of the cotton, a plurality of aperturesbeing formed in each said inclined surface at the upper edge thereof sothat the rear wall of each said aperture extends substantiallyvertically, for the purpose described.

2. A screen for cotton cleaners comprising a metal sheet provided withcorrugations, the length of each of which is transverse to the directionof movement over the screen of cotton to be cleaned and each corrugationproviding a supporting surface which is inclined upwardly in thedirection of movement of the cotton, a plurality of aperturestransversely elongated being formed in eachsaid inclined surface, theapertures extending longitudinally with respect to the length of thescreen from a point adjacent the lower portionof the inclined surface tothe upper edge of the inclined surface, so that the rear wall of each ofthe apertures extends substantially vertical.

' 3. A screen for cotton cleaners comprising a stationary corrugatedsheet, each corrugation providing a supporting surface which is inclinedupwardly in the direction in which the cotton to be cleaned is movedthereon, said supporting surface being provided with a row of aperturesadjacent the upper edge thereof so that the rear wall of each of theapertures extends substantially vertically.

4. A screen for cotton cleaners comprising a stationary corrugatedsheet, each corrugation comprising a vertical wall and an inclined wallextending upwardly to the upper edge of the vertical wall in thedirection in which cotton to be cleaned is moved on the sheet, saidupwardly inclined wall having a row of apertures therein adjacent thevertical wall so that the rear wall of each of the apertures extendssubstantially vertically.

ALEXANDER S. MACKENZIE.

